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/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h" /* must be first for large file support */
#include "Song.hxx"
#include "util/UriUtil.hxx"
#include "util/Error.hxx"
#include "Directory.hxx"
#include "Mapper.hxx"
#include "fs/Path.hxx"
#include "fs/FileSystem.hxx"
#include "InputStream.hxx"
#include "DecoderPlugin.hxx"
#include "DecoderList.hxx"
#include "tag/Tag.hxx"
#include "tag/TagBuilder.hxx"
#include "tag/TagHandler.hxx"
#include "tag/TagId3.hxx"
#include "tag/ApeTag.hxx"
#include "thread/Cond.hxx"
#include <assert.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
Song *
Song::LoadFile(const char *path_utf8, Directory *parent)
{
Song *song;
bool ret;
assert((parent == NULL) == Path::IsAbsoluteUTF8(path_utf8));
assert(!uri_has_scheme(path_utf8));
assert(strchr(path_utf8, '\n') == NULL);
song = NewFile(path_utf8, parent);
//in archive ?
if (parent != NULL && parent->device == DEVICE_INARCHIVE) {
ret = song->UpdateFileInArchive();
} else {
ret = song->UpdateFile();
}
if (!ret) {
song->Free();
return NULL;
}
return song;
}
/**
* Attempts to load APE or ID3 tags from the specified file.
*/
static bool
tag_scan_fallback(const char *path,
const struct tag_handler *handler, void *handler_ctx)
{
return tag_ape_scan2(path, handler, handler_ctx) ||
tag_id3_scan(path, handler, handler_ctx);
}
bool
Song::UpdateFile()
{
const char *suffix;
const struct decoder_plugin *plugin;
struct stat st;
struct input_stream *is = NULL;
assert(IsFile());
/* check if there's a suffix and a plugin */
suffix = uri_get_suffix(uri);
if (suffix == NULL)
return false;
plugin = decoder_plugin_from_suffix(suffix, NULL);
if (plugin == NULL)
return false;
const Path path_fs = map_song_fs(this);
if (path_fs.IsNull())
return false;
delete tag;
tag = nullptr;
if (!StatFile(path_fs, st) || !S_ISREG(st.st_mode)) {
return false;
}
mtime = st.st_mtime;
Mutex mutex;
Cond cond;
TagBuilder tag_builder;
do {
/* load file tag */
if (decoder_plugin_scan_file(plugin, path_fs.c_str(),
&full_tag_handler, &tag_builder))
break;
tag_builder.Clear();
/* fall back to stream tag */
if (plugin->scan_stream != NULL) {
/* open the input_stream (if not already
open) */
if (is == NULL)
is = input_stream::Open(path_fs.c_str(),
mutex, cond,
IgnoreError());
/* now try the stream_tag() method */
if (is != NULL) {
if (decoder_plugin_scan_stream(plugin, is,
&full_tag_handler,
&tag_builder))
break;
tag_builder.Clear();
is->LockSeek(0, SEEK_SET, IgnoreError());
}
}
plugin = decoder_plugin_from_suffix(suffix, plugin);
} while (plugin != NULL);
if (is != NULL)
is->Close();
if (!tag_builder.IsDefined())
return false;
if (tag_builder.IsEmpty())
tag_scan_fallback(path_fs.c_str(), &full_tag_handler,
&tag_builder);
tag = tag_builder.Commit();
return true;
}
bool
Song::UpdateFileInArchive()
{
const char *suffix;
const struct decoder_plugin *plugin;
assert(IsFile());
/* check if there's a suffix and a plugin */
suffix = uri_get_suffix(uri);
if (suffix == NULL)
return false;
plugin = decoder_plugin_from_suffix(suffix, NULL);
if (plugin == NULL)
return false;
delete tag;
//accept every file that has music suffix
//because we don't support tag reading through
//input streams
tag = new Tag();
return true;
}
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